Candle socket



K. K. NIELSEN CANDLE SOCKET Feb. 26, 1929.

Original Filed Jan. 28, 1927 Patented eb. 25, i929.

iran f STATES PATENT OFFICE.

KARL K. NIELSEN, OF CHICAGO, ILLINOIS, ASSIGNOR TO ALCOR MANUFACTURING' COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CANDLE SOCKET.

Original application filed lanuary 2S, 1927, Serial No. 164,165. Divided and this application led i August 8, 1927. Serial No. 211,320.

My invention relates to lighting fixtures of the candle type, in which a socket'for the lamp is supported in the upper end of a tubular jacket by a support connected to the fixtures at or near the lower end of this jacket, and in which the shell of the socket is insulated from this jacket by a tube of insulating material.

Generally speaking, my invention aims to provide a socalled candle-socket for this purpose which can readily be adjusted as to its length, which will permit the needed adjustment in length to be made accurately without the use of a rule, in which a single and accessibly positioned screw locks the adjustably connected parts against displacement, and in which cheaply manufactured parts can be employed for insulating and supporting the socket, and in which numerousconstituent elements interlock with each other to prevent their relative rotation. It also aims to provide means for supporting an insulating tube housing the conducting parts of the socket, and auxiliary means for frictionally holding this tube in position.

More particularly, my invention provides a socket support for an electric appliance of this kind in which the main members consist of two slidably interfitting forked members, in which graduations on one of these members indicate the effective total length of the appliance; and in which simple formations on the arms of the two forks co-operate with a single screw and a presser member in holding the two forked members rigidly connected, and in preventingthe fork arms from bending toward each other.. y

Furthermore, my invention provides a construction of this general nature in which integral formations on one of the forked members sufi-ice as supports for supporting the insulating tube and in which one of the insulations for the conducting parts ofv the socket is formeel for retaining this tube on the said formations.

Still further and more detailed objects will appear from the following specification and from the accompanying drawings, in which Fig. 1 is a central, vertical and longitudinal section through a candle socket embodying my invention, showing this in connection with the lamp and the usual adjacent fixture portions.

Fig. 2 is an enlarged central, vertical and longitudinal section taken through the insulating tube of Fig. 1 and through the upper portion of the support in a plane at right angles to Fig. l, with the socket proper shown in elevation.

Fig. 3 is a perspective view of the upper forked member. Fig. 4 is a horizontal section taken along the line 4 4 of Fig. 2 and looking upward.

Fig. 5 is a perspective view of the upper end portions of the lower forked member of the support and of the presser member which bears against one arm of this forked member.

Fig. 6 is a side elevation of a lower portion of the upper forked member, with one arm end of the lower forked member shown in position for interlocking with the same.

Fig. 7 is a plan view of the intermediate one of the three insulating disks disposed below the metal socket shell, kdrawn on the same scale as Fig. 1.

Fig. 8 is a plan view of the lowest insulating disk.

Fig. 9 is a plan View of the rupper insulating disk.

yThis application is a division of application Serial Number 164,165 filed Jan. 28, 1927 now Patent Number 1,690,693, dated Nov. 6, 1928.

In the illustrated embodiment, the support for the socket proper comprises two forked members each of which has vertical shanks spaced by an adequate distance for affording stiffness to the resulting structure. The lower of these forked members comprises a base 1 threaded to fit a threaded stud 2 at the upper end of the fixture 3 to which my candle socket is attached, and a pair of riser Shanks 4. Each of these shanks bears fiatwise against one of the shanks 7 of the upper forked member, and the lower shanks 4l have lateral flanges 5 snugly housed by lateral y flanges 6 on the Shanks 7 of the upper forked member, whereby these flanges prevent relative lateral and rotational movement of the two forked members.

The shanks 7 of the upper forked member kare connected at their upper ends by a top 2 1 restes said rivet shank extends, one being an ir-- ner insulatorl which seats on tl'iebottoin of the said threaded shell and which supports a radial arrn 14 of one wire terininal 15 of the socket. rlhe rivet shank 10 extends through this radial arni 14 also and has its upper head 1()A disposed for engaging the axial terininal 16 of a lainp 37 screwed into the socket shell 12.

An upper insulating disk 17 interposed between the top plate 8 and the base of the metal socket shell. 12 has a central. perforation through which the rivet shank 10 exten ds andA also has two opposite peripheral notches through which the wire terinina'ls 15 and 1S respectively extend, the terminal 18 being riveted' to the said socket shell. These wire terminals also extend through opposed edge recesses 19A in an intermediate insulating disk 19 which has a perforation 19B forined with enlargen'ients for receiving the flanges of the upper forked nienibe The lowern'iost insulator 2O has a central portion under-hanging the top plate 8 of the upper forked ineinber and has opposed recesses 2O^4Alaterally housing the flanges (i onthat forked uieinber, and this lowerinost insulator also has opposed edge recesses 2()B through which the wire terminals and 18 respectively entend.

lith the parts thus arranged, the recesses engaged by the shanks of the upper forked nieniber prevent all three of the insulators belowthe top plate 8 of that ineinber froin rotating about the rivet shank 10, and the engagein'eiit of other recesses by the wire terminal 18 (which is secured to the threaded socket shell) prevents that shell from rotating. Hence the fastening of the single rivet (which has its lower head 10B underhanging the lowerinost insulator 20) secures the socket proper rigidly to the upper forked ineinber.

Extending looselythrough a perforation near the upper ond of one shank of the lower forked ,nieinbcr is a screw 21 which has its tip adapted to enter a recess 32 in the opposite shank Li, and which screw extends through vertical slots 7^ in both shanks of the upper supporting ineinber. The head of the screw 2l engages the outer face of the shank 4l which is perforated for the screw and the screw is tln'cadr'nly through a presser plate 22 which cngaoes the inner face of the shank 7, which' pre r plate has flanges 22* at its ends for overhauging the flanges 7^ ou the last inlined shank. rl`he tip portion of the shank Ll which has the `said recess 32 has as a: rigid extension a T-shap-ed part including a stein 23 which extends through the slot 7A in the adjacent lower shank 7 and a head ,24rwhich bears against the inner face of the last named shank. lilith the screw 21 of a suitable length, a tightening of this screw silnultaneouslyT clamps the shanks 1i; and 7 ofthe two forked members (at the right side of Fig. 2) between the presser member and the head of this screw, and also causes the' tip of the screw to press theopposite'lower sha-nk fr outwardly so as to force the said head against the inner face of the uppersh'ank 7 the left side of Fig. 2. Consequently, the single screw simultaneously clamps each shank of the lower forked ineinber to the adjacent shank of the upper forked member, so that l secure an unusually rigid assembly.

However, a slight loosening of the screw 21 releases this clamping and perinits the upper forked* inembei"y to be slid freely up-l ward or downward to vary the effective length of the socket. To facilitate an exact adjustinent of this length without requiring the use of a scale, l preferably inark one shank of the upper forked ineinbe'r with' graduations 25 adapted to be read froin the upper end of the adjacent shank'of the lower forkedI ineinbei'.`

llllhen installed, the supporting structure is usually concealed by a white or ivory tinted tube 2o supported by a suitable cup-like structure-*such as that snown in' Fig. l-which fornis no part of iny present invention. This tube 2o inay be of glass and' desirably cushion it froin jarring against the inetal screw shell 12 of the socket by interposing an' insulating tube 27 of fibre or the like. To sup'- port this tube 27, l forni each shank 7 of the upper forked ineinber with an outwardly di- Iect'ed linger 28, so that the tube 27 seats on these lingers. rlhen l provide nubs 29 on the periphery of the insulator 17 on which the inetal screw shell seats, which nulos project so as to lit the insulating tube 27 with sufficient friction to hold the said tube' down on the lingers 28.

Since both forked n'ieinbers as well as all of the four insulators and the' presser plate are easily inade by siinpl'e punch press operations followed by only two threading oper'- ations, the construction of my adjustable socket-supporting and socket-insuh'i'tiiig structure is both s-iinple and in'eXpei'isive. Moreover, the assembly is also easy, as the l -shaped extension on one shank of the lower forked nieinber can readily be inte'rlo'cke'd with a slotted shank of the upper forked ineinber while these two rneinbe'rs are re`latively tilted, as shown in Fig. (3.

However7 l do not wish to be liinited to the details of thc construction and arrangement above described, since changes inight ob? viously be inade without departing either from the spirit of iny invention or from the appended claiins. Nor do l wish to be limited to the use of all novel features of iny invention in combination with one another.

I claiin as iny invention:

1. A support for an' upright lainp socket, comprising an upper nielnber of inverted lil-shape secured at its" top to the socket;v a lower U-shaped member adapted to be secured to a iXture part and' having" its Shanks lll) lil)

slidably mgaging the Shanks oit' the upper' member, the shanks oit' the upper memberI be ing provided with longitudinal slots; and means spanning the Shanks of the lower member and extending through the slots in both shanks of the upper member and operating in the same direction for clamping the two shank tips of the lower member respectively against the inner and the outer tacos of th Shanks ot' the upper member.

2. A support tor an uprightlamp socket, comprising an upper member 'of inverted U-shape secured at its top to the socket; a lower U-hapcd member adapted to be secured to a fixture part and having its shanks Slidably engaging the outer :t'aces ot the shanks oit the upper member, the Shanks of the upper member being provided with longitudinal slots and a presser-member engaging the inner tace of one shank of the lower member; a screw threaded through the presser member and extending through the slots in both shanks ot the upper member for clamping the Shanks ot the lower member respectively against those sides of the re- Specti'ely adajacent shanks oi the upper member which tace in the same direction.

f socket and support as per claim 1,

c). in which a shank of the lowermember has portions thereof respectively engaging the inner and the outer faces of the adjacent shank of the upper member, thereby cooperating with the said means for rigidly spacing the Shanks ot each member.

A socket Support comprising an upper member or" inverted U-shape secured at its top to the socket and having its shanks provided with longitudinal slots; a lower U-Shaped member having its shanks slidably engaging the outer iiaces of the Shanks of the upper member, an anchoring element tast onv one shank oi' the lower member engaging the inner face of the adjacent shank ot the upper member, and means including a clamping member extending through the two shanks at the other side of the support trom the anchoring element tor clamping the last named two shanks to each other and for rigidly spacing the shanks of the lower member from each other.

5. A socket support as per claim 4, in which the anchoring element comprises a substantially T-shaped extension ot the shank on which it is tast, the stem ot the T being narrower than vthe slot in the adjacent shank oit the upper member and the said extension being' formed to permit ot inserting the head of the T through the said slot when the two members are in a relatively oblique position.

6. A socket support comprising an upper member ot.' inverted U-shape secured at its top to the socket and having its Shanks provided with longitudinal slots; a lower U-shaped member having its Shanks slidably engaging the outer faces of the Shanks of the upper member, an anchoring element tast on one shank of the lower member engaging the inner tace ot' the adjacent shank ot' the upper member, a presser member engaging the inner tace oithe shank oi the lower member at the said ingers and housing the socket, andan insulator disposed between the top of the upper member and the socket, the insulator having radially projecting nubs engaging the bore ot' the insulating tube.

Signed at Chicago, Illinois, Augustfl, 1927.

KARL K. N IELSEN. 

